02/12/2026
When installing mosaic tile on a floor, one step that separates a professional job from an average one is knocking down the trowel ridges after spreading thinset.
Here’s why 👇
Mosaic tiles are small. That means they need full support underneath every single piece. If you leave the thinset ridges standing and press the sheet down, some tiles sit on top of a ridge while others fall in between them. That can create hollow spots.
On a floor, hollow spots = cracked tile later.
Flattening the ridges creates a smooth, even bed so every tile has 100% contact with the substrate. It also keeps thinset from squeezing up into the grout joints, which gives you cleaner grout lines and a better finished look.
It takes a little extra time, but details like this are what make a floor solid, flat, and built to last.
Quality isn’t just what you see on the surface — it’s what’s underneath that matters.